/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.inlong.sort.elasticsearch;

import org.apache.flink.annotation.Internal;

import java.util.concurrent.ConcurrentLinkedQueue;

/**
 * Implementation of a {@link RequestIndexer} that buffers {@link Request request}
 * before re-sending them to the Elasticsearch cluster upon request.
 */
@Internal
class BufferingNoOpRequestIndexer<Request> implements RequestIndexer<Request> {

    private final ConcurrentLinkedQueue<Request> bufferedRequests;

    BufferingNoOpRequestIndexer() {
        this.bufferedRequests = new ConcurrentLinkedQueue<>();
    }

    @Override
    public void add(Request request) {
        bufferedRequests.add(request);
    }

    void processBufferedRequests(RequestIndexer<Request> actualIndexer) {
        for (Request request : bufferedRequests) {
            actualIndexer.add(request);
        }
        bufferedRequests.clear();
    }
}
